1 //! Compilation of native dependencies like LLVM.
3 //! Native projects like LLVM unfortunately aren't suited just yet for
4 //! compilation in build scripts that Cargo has. This is because the
5 //! compilation takes a *very* long time but also because we don't want to
6 //! compile LLVM 3 times as part of a normal bootstrap (we want it cached).
8 //! LLVM and compiler-rt are essentially just wired up to everything else to
9 //! ensure that they're always in place if needed.
12 use std
::env
::consts
::EXE_EXTENSION
;
13 use std
::ffi
::{OsStr, OsString}
;
14 use std
::fs
::{self, File}
;
16 use std
::path
::{Path, PathBuf}
;
17 use std
::process
::Command
;
19 use build_helper
::{output, t}
;
21 use crate::builder
::{Builder, RunConfig, ShouldRun, Step}
;
22 use crate::config
::TargetSelection
;
23 use crate::util
::{self, exe}
;
25 use build_helper
::up_to_date
;
29 build_llvm_config
: PathBuf
,
34 // This returns whether we've already previously built LLVM.
36 // It's used to avoid busting caches during x.py check -- if we've already built
37 // LLVM, it's fine for us to not try to avoid doing so.
39 // This will return the llvm-config if it can get it (but it will not build it
41 pub fn prebuilt_llvm_config(
42 builder
: &Builder
<'_
>,
43 target
: TargetSelection
,
44 ) -> Result
<PathBuf
, Meta
> {
45 // If we're using a custom LLVM bail out here, but we can only use a
46 // custom LLVM for the build triple.
47 if let Some(config
) = builder
.config
.target_config
.get(&target
) {
48 if let Some(ref s
) = config
.llvm_config
{
49 check_llvm_version(builder
, s
);
50 return Ok(s
.to_path_buf());
54 let root
= "src/llvm-project/llvm";
55 let out_dir
= builder
.llvm_out(target
);
57 let mut llvm_config_ret_dir
= builder
.llvm_out(builder
.config
.build
);
58 if !builder
.config
.build
.contains("msvc") || builder
.ninja() {
59 llvm_config_ret_dir
.push("build");
61 llvm_config_ret_dir
.push("bin");
63 let build_llvm_config
= llvm_config_ret_dir
.join(exe("llvm-config", builder
.config
.build
));
65 let stamp
= out_dir
.join("llvm-finished-building");
66 let stamp
= HashStamp
::new(stamp
, builder
.in_tree_llvm_info
.sha());
68 if builder
.config
.llvm_skip_rebuild
&& stamp
.path
.exists() {
71 Using a potentially stale build of LLVM; \
72 This may not behave well.",
74 return Ok(build_llvm_config
);
78 if stamp
.hash
.is_none() {
80 "Could not determine the LLVM submodule commit hash. \
81 Assuming that an LLVM rebuild is not necessary.",
83 builder
.info(&format
!(
84 "To force LLVM to rebuild, remove the file `{}`",
88 return Ok(build_llvm_config
);
91 Err(Meta { stamp, build_llvm_config, out_dir, root: root.into() }
)
94 #[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)]
96 pub target
: TargetSelection
,
100 type Output
= PathBuf
; // path to llvm-config
102 const ONLY_HOSTS
: bool
= true;
104 fn should_run(run
: ShouldRun
<'_
>) -> ShouldRun
<'_
> {
105 run
.path("src/llvm-project").path("src/llvm-project/llvm").path("src/llvm")
108 fn make_run(run
: RunConfig
<'_
>) {
109 run
.builder
.ensure(Llvm { target: run.target }
);
112 /// Compile LLVM for `target`.
113 fn run(self, builder
: &Builder
<'_
>) -> PathBuf
{
114 let target
= self.target
;
115 let target_native
= if self.target
.starts_with("riscv") {
116 // RISC-V target triples in Rust is not named the same as C compiler target triples.
117 // This converts Rust RISC-V target triples to C compiler triples.
118 let idx
= target
.triple
.find('
-'
).unwrap();
120 format
!("riscv{}{}", &target
.triple
[5..7], &target
.triple
[idx
..])
121 } else if self.target
.starts_with("powerpc") && self.target
.ends_with("freebsd") {
122 // FreeBSD 13 had incompatible ABI changes on all PowerPC platforms.
123 // Set the version suffix to 13.0 so the correct target details are used.
124 format
!("{}{}", self.target
, "13.0")
129 let Meta { stamp, build_llvm_config, out_dir, root }
=
130 match prebuilt_llvm_config(builder
, target
) {
135 builder
.update_submodule(&Path
::new("src").join("llvm-project"));
136 if builder
.config
.llvm_link_shared
137 && (target
.contains("windows") || target
.contains("apple-darwin"))
139 panic
!("shared linking to LLVM is not currently supported on {}", target
.triple
);
142 builder
.info(&format
!("Building LLVM for {}", target
));
144 let _time
= util
::timeit(&builder
);
145 t
!(fs
::create_dir_all(&out_dir
));
147 // https://llvm.org/docs/CMake.html
148 let mut cfg
= cmake
::Config
::new(builder
.src
.join(root
));
150 let profile
= match (builder
.config
.llvm_optimize
, builder
.config
.llvm_release_debuginfo
) {
151 (false, _
) => "Debug",
152 (true, false) => "Release",
153 (true, true) => "RelWithDebInfo",
156 // NOTE: remember to also update `config.toml.example` when changing the
158 let llvm_targets
= match &builder
.config
.llvm_targets
{
161 "AArch64;ARM;BPF;Hexagon;MSP430;Mips;NVPTX;PowerPC;RISCV;\
162 Sparc;SystemZ;WebAssembly;X86"
166 let llvm_exp_targets
= match builder
.config
.llvm_experimental_targets
{
171 let assertions
= if builder
.config
.llvm_assertions { "ON" }
else { "OFF" }
;
172 let plugins
= if builder
.config
.llvm_plugins { "ON" }
else { "OFF" }
;
174 cfg
.out_dir(&out_dir
)
176 .define("LLVM_ENABLE_ASSERTIONS", assertions
)
177 .define("LLVM_ENABLE_PLUGINS", plugins
)
178 .define("LLVM_TARGETS_TO_BUILD", llvm_targets
)
179 .define("LLVM_EXPERIMENTAL_TARGETS_TO_BUILD", llvm_exp_targets
)
180 .define("LLVM_INCLUDE_EXAMPLES", "OFF")
181 .define("LLVM_INCLUDE_DOCS", "OFF")
182 .define("LLVM_INCLUDE_BENCHMARKS", "OFF")
183 .define("LLVM_INCLUDE_TESTS", "OFF")
184 .define("LLVM_ENABLE_TERMINFO", "OFF")
185 .define("LLVM_ENABLE_LIBEDIT", "OFF")
186 .define("LLVM_ENABLE_BINDINGS", "OFF")
187 .define("LLVM_ENABLE_Z3_SOLVER", "OFF")
188 .define("LLVM_PARALLEL_COMPILE_JOBS", builder
.jobs().to_string())
189 .define("LLVM_TARGET_ARCH", target_native
.split('
-'
).next().unwrap())
190 .define("LLVM_DEFAULT_TARGET_TRIPLE", target_native
);
192 // Parts of our test suite rely on the `FileCheck` tool, which is built by default in
193 // `build/$TARGET/llvm/build/bin` is but *not* then installed to `build/$TARGET/llvm/bin`.
194 // This flag makes sure `FileCheck` is copied in the final binaries directory.
195 cfg
.define("LLVM_INSTALL_UTILS", "ON");
197 if builder
.config
.llvm_profile_generate
{
198 cfg
.define("LLVM_BUILD_INSTRUMENTED", "IR");
199 cfg
.define("LLVM_BUILD_RUNTIME", "No");
201 if let Some(path
) = builder
.config
.llvm_profile_use
.as_ref() {
202 cfg
.define("LLVM_PROFDATA_FILE", &path
);
205 if target
!= "aarch64-apple-darwin" && !target
.contains("windows") {
206 cfg
.define("LLVM_ENABLE_ZLIB", "ON");
208 cfg
.define("LLVM_ENABLE_ZLIB", "OFF");
211 // Are we compiling for iOS/tvOS?
212 if target
.contains("apple-ios") || target
.contains("apple-tvos") {
213 // These two defines prevent CMake from automatically trying to add a MacOSX sysroot, which leads to a compiler error.
214 cfg
.define("CMAKE_OSX_SYSROOT", "/");
215 cfg
.define("CMAKE_OSX_DEPLOYMENT_TARGET", "");
216 // Prevent cmake from adding -bundle to CFLAGS automatically, which leads to a compiler error because "-bitcode_bundle" also gets added.
217 cfg
.define("LLVM_ENABLE_PLUGINS", "OFF");
218 // Zlib fails to link properly, leading to a compiler error.
219 cfg
.define("LLVM_ENABLE_ZLIB", "OFF");
222 if builder
.config
.llvm_thin_lto
{
223 cfg
.define("LLVM_ENABLE_LTO", "Thin");
224 if !target
.contains("apple") {
225 cfg
.define("LLVM_ENABLE_LLD", "ON");
229 // This setting makes the LLVM tools link to the dynamic LLVM library,
230 // which saves both memory during parallel links and overall disk space
231 // for the tools. We don't do this on every platform as it doesn't work
232 // equally well everywhere.
234 // If we're not linking rustc to a dynamic LLVM, though, then don't link
236 if builder
.llvm_link_tools_dynamically(target
) && builder
.config
.llvm_link_shared
{
237 cfg
.define("LLVM_LINK_LLVM_DYLIB", "ON");
240 // For distribution we want the LLVM tools to be *statically* linked to libstdc++
241 if builder
.config
.llvm_tools_enabled
{
242 if !target
.contains("msvc") {
243 if target
.contains("apple") {
244 cfg
.define("CMAKE_EXE_LINKER_FLAGS", "-static-libstdc++");
246 cfg
.define("CMAKE_EXE_LINKER_FLAGS", "-Wl,-Bsymbolic -static-libstdc++");
251 if target
.starts_with("riscv") {
252 // In RISC-V, using C++ atomics require linking to `libatomic` but the LLVM build
253 // system check cannot detect this. Therefore it is set manually here.
254 if !builder
.config
.llvm_tools_enabled
{
255 cfg
.define("CMAKE_EXE_LINKER_FLAGS", "-latomic");
257 cfg
.define("CMAKE_EXE_LINKER_FLAGS", "-latomic -static-libstdc++");
259 cfg
.define("CMAKE_SHARED_LINKER_FLAGS", "-latomic");
262 if target
.contains("msvc") {
263 cfg
.define("LLVM_USE_CRT_DEBUG", "MT");
264 cfg
.define("LLVM_USE_CRT_RELEASE", "MT");
265 cfg
.define("LLVM_USE_CRT_RELWITHDEBINFO", "MT");
266 cfg
.static_crt(true);
269 if target
.starts_with("i686") {
270 cfg
.define("LLVM_BUILD_32_BITS", "ON");
273 let mut enabled_llvm_projects
= Vec
::new();
275 if util
::forcing_clang_based_tests() {
276 enabled_llvm_projects
.push("clang");
277 enabled_llvm_projects
.push("compiler-rt");
280 if builder
.config
.llvm_polly
{
281 enabled_llvm_projects
.push("polly");
284 if builder
.config
.llvm_clang
{
285 enabled_llvm_projects
.push("clang");
288 // We want libxml to be disabled.
289 // See https://github.com/rust-lang/rust/pull/50104
290 cfg
.define("LLVM_ENABLE_LIBXML2", "OFF");
292 if !enabled_llvm_projects
.is_empty() {
293 enabled_llvm_projects
.sort();
294 enabled_llvm_projects
.dedup();
295 cfg
.define("LLVM_ENABLE_PROJECTS", enabled_llvm_projects
.join(";"));
298 if let Some(num_linkers
) = builder
.config
.llvm_link_jobs
{
300 cfg
.define("LLVM_PARALLEL_LINK_JOBS", num_linkers
.to_string());
304 // Workaround for ppc32 lld limitation
305 if target
== "powerpc-unknown-freebsd" {
306 cfg
.define("CMAKE_EXE_LINKER_FLAGS", "-fuse-ld=bfd");
309 // https://llvm.org/docs/HowToCrossCompileLLVM.html
310 if target
!= builder
.config
.build
{
311 builder
.ensure(Llvm { target: builder.config.build }
);
312 // FIXME: if the llvm root for the build triple is overridden then we
313 // should use llvm-tblgen from there, also should verify that it
314 // actually exists most of the time in normal installs of LLVM.
315 let host_bin
= builder
.llvm_out(builder
.config
.build
).join("bin");
316 cfg
.define("CMAKE_CROSSCOMPILING", "True");
317 cfg
.define("LLVM_TABLEGEN", host_bin
.join("llvm-tblgen").with_extension(EXE_EXTENSION
));
318 cfg
.define("LLVM_NM", host_bin
.join("llvm-nm").with_extension(EXE_EXTENSION
));
321 host_bin
.join("llvm-config").with_extension(EXE_EXTENSION
),
325 if let Some(ref suffix
) = builder
.config
.llvm_version_suffix
{
326 // Allow version-suffix="" to not define a version suffix at all.
327 if !suffix
.is_empty() {
328 cfg
.define("LLVM_VERSION_SUFFIX", suffix
);
330 } else if builder
.config
.channel
== "dev" {
331 // Changes to a version suffix require a complete rebuild of the LLVM.
332 // To avoid rebuilds during a time of version bump, don't include rustc
333 // release number on the dev channel.
334 cfg
.define("LLVM_VERSION_SUFFIX", "-rust-dev");
336 let suffix
= format
!("-rust-{}-{}", builder
.version
, builder
.config
.channel
);
337 cfg
.define("LLVM_VERSION_SUFFIX", suffix
);
340 if let Some(ref linker
) = builder
.config
.llvm_use_linker
{
341 cfg
.define("LLVM_USE_LINKER", linker
);
344 if builder
.config
.llvm_allow_old_toolchain
{
345 cfg
.define("LLVM_TEMPORARILY_ALLOW_OLD_TOOLCHAIN", "YES");
348 configure_cmake(builder
, target
, &mut cfg
, true);
350 // FIXME: we don't actually need to build all LLVM tools and all LLVM
351 // libraries here, e.g., we just want a few components and a few
352 // tools. Figure out how to filter them down and only build the right
353 // tools and libs on all platforms.
355 if builder
.config
.dry_run
{
356 return build_llvm_config
;
367 fn check_llvm_version(builder
: &Builder
<'_
>, llvm_config
: &Path
) {
368 if !builder
.config
.llvm_version_check
{
372 if builder
.config
.dry_run
{
376 let mut cmd
= Command
::new(llvm_config
);
377 let version
= output(cmd
.arg("--version"));
378 let mut parts
= version
.split('
.'
).take(2).filter_map(|s
| s
.parse
::<u32>().ok());
379 if let (Some(major
), Some(_minor
)) = (parts
.next(), parts
.next()) {
384 panic
!("\n\nbad LLVM version: {}, need >=10.0\n\n", version
)
388 builder
: &Builder
<'_
>,
389 target
: TargetSelection
,
390 cfg
: &mut cmake
::Config
,
391 use_compiler_launcher
: bool
,
393 // Do not print installation messages for up-to-date files.
394 // LLVM and LLD builds can produce a lot of those and hit CI limits on log size.
395 cfg
.define("CMAKE_INSTALL_MESSAGE", "LAZY");
397 // Do not allow the user's value of DESTDIR to influence where
398 // LLVM will install itself. LLVM must always be installed in our
399 // own build directories.
400 cfg
.env("DESTDIR", "");
403 cfg
.generator("Ninja");
405 cfg
.target(&target
.triple
).host(&builder
.config
.build
.triple
);
407 if target
!= builder
.config
.build
{
408 if target
.contains("netbsd") {
409 cfg
.define("CMAKE_SYSTEM_NAME", "NetBSD");
410 } else if target
.contains("freebsd") {
411 cfg
.define("CMAKE_SYSTEM_NAME", "FreeBSD");
412 } else if target
.contains("windows") {
413 cfg
.define("CMAKE_SYSTEM_NAME", "Windows");
414 } else if target
.contains("haiku") {
415 cfg
.define("CMAKE_SYSTEM_NAME", "Haiku");
416 } else if target
.contains("solaris") || target
.contains("illumos") {
417 cfg
.define("CMAKE_SYSTEM_NAME", "SunOS");
419 // When cross-compiling we should also set CMAKE_SYSTEM_VERSION, but in
420 // that case like CMake we cannot easily determine system version either.
422 // Since, the LLVM itself makes rather limited use of version checks in
423 // CMakeFiles (and then only in tests), and so far no issues have been
424 // reported, the system version is currently left unset.
427 let sanitize_cc
= |cc
: &Path
| {
428 if target
.contains("msvc") {
429 OsString
::from(cc
.to_str().unwrap().replace("\\", "/"))
431 cc
.as_os_str().to_owned()
435 // MSVC with CMake uses msbuild by default which doesn't respect these
436 // vars that we'd otherwise configure. In that case we just skip this
438 if target
.contains("msvc") && !builder
.ninja() {
442 let (cc
, cxx
) = match builder
.config
.llvm_clang_cl
{
443 Some(ref cl
) => (cl
.as_ref(), cl
.as_ref()),
444 None
=> (builder
.cc(target
), builder
.cxx(target
).unwrap()),
447 // Handle msvc + ninja + ccache specially (this is what the bots use)
448 if target
.contains("msvc") && builder
.ninja() && builder
.config
.ccache
.is_some() {
449 let mut wrap_cc
= env
::current_exe().expect("failed to get cwd");
450 wrap_cc
.set_file_name("sccache-plus-cl.exe");
452 cfg
.define("CMAKE_C_COMPILER", sanitize_cc(&wrap_cc
))
453 .define("CMAKE_CXX_COMPILER", sanitize_cc(&wrap_cc
));
454 cfg
.env("SCCACHE_PATH", builder
.config
.ccache
.as_ref().unwrap())
455 .env("SCCACHE_TARGET", target
.triple
)
456 .env("SCCACHE_CC", &cc
)
457 .env("SCCACHE_CXX", &cxx
);
459 // Building LLVM on MSVC can be a little ludicrous at times. We're so far
460 // off the beaten path here that I'm not really sure this is even half
461 // supported any more. Here we're trying to:
463 // * Build LLVM on MSVC
464 // * Build LLVM with `clang-cl` instead of `cl.exe`
465 // * Build a project with `sccache`
466 // * Build for 32-bit as well
467 // * Build with Ninja
469 // For `cl.exe` there are different binaries to compile 32/64 bit which
470 // we use but for `clang-cl` there's only one which internally
471 // multiplexes via flags. As a result it appears that CMake's detection
472 // of a compiler's architecture and such on MSVC **doesn't** pass any
473 // custom flags we pass in CMAKE_CXX_FLAGS below. This means that if we
474 // use `clang-cl.exe` it's always diagnosed as a 64-bit compiler which
475 // definitely causes problems since all the env vars are pointing to
478 // To hack around this... again... we pass an argument that's
479 // unconditionally passed in the sccache shim. This'll get CMake to
480 // correctly diagnose it's doing a 32-bit compilation and LLVM will
481 // internally configure itself appropriately.
482 if builder
.config
.llvm_clang_cl
.is_some() && target
.contains("i686") {
483 cfg
.env("SCCACHE_EXTRA_ARGS", "-m32");
486 // If ccache is configured we inform the build a little differently how
487 // to invoke ccache while also invoking our compilers.
488 if use_compiler_launcher
{
489 if let Some(ref ccache
) = builder
.config
.ccache
{
490 cfg
.define("CMAKE_C_COMPILER_LAUNCHER", ccache
)
491 .define("CMAKE_CXX_COMPILER_LAUNCHER", ccache
);
494 cfg
.define("CMAKE_C_COMPILER", sanitize_cc(cc
))
495 .define("CMAKE_CXX_COMPILER", sanitize_cc(cxx
))
496 .define("CMAKE_ASM_COMPILER", sanitize_cc(cc
));
499 cfg
.build_arg("-j").build_arg(builder
.jobs().to_string());
500 let mut cflags
= builder
.cflags(target
, GitRepo
::Llvm
).join(" ");
501 if let Some(ref s
) = builder
.config
.llvm_cflags
{
502 cflags
.push_str(&format
!(" {}", s
));
504 // Some compiler features used by LLVM (such as thread locals) will not work on a min version below iOS 10.
505 if target
.contains("apple-ios") {
506 if target
.contains("86-") {
507 cflags
.push_str(" -miphonesimulator-version-min=10.0");
509 cflags
.push_str(" -miphoneos-version-min=10.0");
512 if builder
.config
.llvm_clang_cl
.is_some() {
513 cflags
.push_str(&format
!(" --target={}", target
))
515 cfg
.define("CMAKE_C_FLAGS", cflags
);
516 let mut cxxflags
= builder
.cflags(target
, GitRepo
::Llvm
).join(" ");
517 if builder
.config
.llvm_static_stdcpp
&& !target
.contains("msvc") && !target
.contains("netbsd") {
518 cxxflags
.push_str(" -static-libstdc++");
520 if let Some(ref s
) = builder
.config
.llvm_cxxflags
{
521 cxxflags
.push_str(&format
!(" {}", s
));
523 if builder
.config
.llvm_clang_cl
.is_some() {
524 cxxflags
.push_str(&format
!(" --target={}", target
))
526 cfg
.define("CMAKE_CXX_FLAGS", cxxflags
);
527 if let Some(ar
) = builder
.ar(target
) {
528 if ar
.is_absolute() {
529 // LLVM build breaks if `CMAKE_AR` is a relative path, for some reason it
530 // tries to resolve this path in the LLVM build directory.
531 cfg
.define("CMAKE_AR", sanitize_cc(ar
));
535 if let Some(ranlib
) = builder
.ranlib(target
) {
536 if ranlib
.is_absolute() {
537 // LLVM build breaks if `CMAKE_RANLIB` is a relative path, for some reason it
538 // tries to resolve this path in the LLVM build directory.
539 cfg
.define("CMAKE_RANLIB", sanitize_cc(ranlib
));
543 if let Some(ref s
) = builder
.config
.llvm_ldflags
{
544 cfg
.define("CMAKE_SHARED_LINKER_FLAGS", s
);
545 cfg
.define("CMAKE_MODULE_LINKER_FLAGS", s
);
546 cfg
.define("CMAKE_EXE_LINKER_FLAGS", s
);
549 if env
::var_os("SCCACHE_ERROR_LOG").is_some() {
550 cfg
.env("RUSTC_LOG", "sccache=warn");
554 #[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)]
556 pub target
: TargetSelection
,
560 type Output
= PathBuf
;
561 const ONLY_HOSTS
: bool
= true;
563 fn should_run(run
: ShouldRun
<'_
>) -> ShouldRun
<'_
> {
564 run
.path("src/llvm-project/lld").path("src/tools/lld")
567 fn make_run(run
: RunConfig
<'_
>) {
568 run
.builder
.ensure(Lld { target: run.target }
);
571 /// Compile LLD for `target`.
572 fn run(self, builder
: &Builder
<'_
>) -> PathBuf
{
573 if builder
.config
.dry_run
{
574 return PathBuf
::from("lld-out-dir-test-gen");
576 let target
= self.target
;
578 let llvm_config
= builder
.ensure(Llvm { target: self.target }
);
580 let out_dir
= builder
.lld_out(target
);
581 let done_stamp
= out_dir
.join("lld-finished-building");
582 if done_stamp
.exists() {
586 builder
.info(&format
!("Building LLD for {}", target
));
587 let _time
= util
::timeit(&builder
);
588 t
!(fs
::create_dir_all(&out_dir
));
590 let mut cfg
= cmake
::Config
::new(builder
.src
.join("src/llvm-project/lld"));
591 configure_cmake(builder
, target
, &mut cfg
, true);
593 // This is an awful, awful hack. Discovered when we migrated to using
594 // clang-cl to compile LLVM/LLD it turns out that LLD, when built out of
595 // tree, will execute `llvm-config --cmakedir` and then tell CMake about
596 // that directory for later processing. Unfortunately if this path has
597 // forward slashes in it (which it basically always does on Windows)
598 // then CMake will hit a syntax error later on as... something isn't
601 // Instead of attempting to fix this problem in upstream CMake and/or
602 // LLVM/LLD we just hack around it here. This thin wrapper will take the
603 // output from llvm-config and replace all instances of `\` with `/` to
604 // ensure we don't hit the same bugs with escaping. It means that you
605 // can't build on a system where your paths require `\` on Windows, but
606 // there's probably a lot of reasons you can't do that other than this.
607 let llvm_config_shim
= env
::current_exe().unwrap().with_file_name("llvm-config-wrapper");
609 cfg
.out_dir(&out_dir
)
611 .env("LLVM_CONFIG_REAL", &llvm_config
)
612 .define("LLVM_CONFIG_PATH", llvm_config_shim
)
613 .define("LLVM_INCLUDE_TESTS", "OFF");
615 // While we're using this horrible workaround to shim the execution of
616 // llvm-config, let's just pile on more. I can't seem to figure out how
617 // to build LLD as a standalone project and also cross-compile it at the
618 // same time. It wants a natively executable `llvm-config` to learn
619 // about LLVM, but then it learns about all the host configuration of
620 // LLVM and tries to link to host LLVM libraries.
622 // To work around that we tell our shim to replace anything with the
623 // build target with the actual target instead. This'll break parts of
624 // LLD though which try to execute host tools, such as llvm-tblgen, so
625 // we specifically tell it where to find those. This is likely super
626 // brittle and will break over time. If anyone knows better how to
627 // cross-compile LLD it would be much appreciated to fix this!
628 if target
!= builder
.config
.build
{
629 cfg
.env("LLVM_CONFIG_SHIM_REPLACE", &builder
.config
.build
.triple
)
630 .env("LLVM_CONFIG_SHIM_REPLACE_WITH", &target
.triple
)
633 llvm_config
.with_file_name("llvm-tblgen").with_extension(EXE_EXTENSION
),
637 // Explicitly set C++ standard, because upstream doesn't do so
638 // for standalone builds.
639 cfg
.define("CMAKE_CXX_STANDARD", "14");
643 t
!(File
::create(&done_stamp
));
648 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
649 pub struct TestHelpers
{
650 pub target
: TargetSelection
,
653 impl Step
for TestHelpers
{
656 fn should_run(run
: ShouldRun
<'_
>) -> ShouldRun
<'_
> {
657 run
.path("src/test/auxiliary/rust_test_helpers.c")
660 fn make_run(run
: RunConfig
<'_
>) {
661 run
.builder
.ensure(TestHelpers { target: run.target }
)
664 /// Compiles the `rust_test_helpers.c` library which we used in various
665 /// `run-pass` tests for ABI testing.
666 fn run(self, builder
: &Builder
<'_
>) {
667 if builder
.config
.dry_run
{
670 // The x86_64-fortanix-unknown-sgx target doesn't have a working C
671 // toolchain. However, some x86_64 ELF objects can be linked
672 // without issues. Use this hack to compile the test helpers.
673 let target
= if self.target
== "x86_64-fortanix-unknown-sgx" {
674 TargetSelection
::from_user("x86_64-unknown-linux-gnu")
678 let dst
= builder
.test_helpers_out(target
);
679 let src
= builder
.src
.join("src/test/auxiliary/rust_test_helpers.c");
680 if up_to_date(&src
, &dst
.join("librust_test_helpers.a")) {
684 builder
.info("Building test helpers");
685 t
!(fs
::create_dir_all(&dst
));
686 let mut cfg
= cc
::Build
::new();
687 // FIXME: Workaround for https://github.com/emscripten-core/emscripten/issues/9013
688 if target
.contains("emscripten") {
692 // We may have found various cross-compilers a little differently due to our
693 // extra configuration, so inform cc of these compilers. Note, though, that
694 // on MSVC we still need cc's detection of env vars (ugh).
695 if !target
.contains("msvc") {
696 if let Some(ar
) = builder
.ar(target
) {
699 cfg
.compiler(builder
.cc(target
));
701 cfg
.cargo_metadata(false)
703 .target(&target
.triple
)
704 .host(&builder
.config
.build
.triple
)
708 .file(builder
.src
.join("src/test/auxiliary/rust_test_helpers.c"))
709 .compile("rust_test_helpers");
713 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
714 pub struct Sanitizers
{
715 pub target
: TargetSelection
,
718 impl Step
for Sanitizers
{
719 type Output
= Vec
<SanitizerRuntime
>;
721 fn should_run(run
: ShouldRun
<'_
>) -> ShouldRun
<'_
> {
722 run
.path("src/llvm-project/compiler-rt").path("src/sanitizers")
725 fn make_run(run
: RunConfig
<'_
>) {
726 run
.builder
.ensure(Sanitizers { target: run.target }
);
729 /// Builds sanitizer runtime libraries.
730 fn run(self, builder
: &Builder
<'_
>) -> Self::Output
{
731 let compiler_rt_dir
= builder
.src
.join("src/llvm-project/compiler-rt");
732 if !compiler_rt_dir
.exists() {
736 let out_dir
= builder
.native_dir(self.target
).join("sanitizers");
737 let runtimes
= supported_sanitizers(&out_dir
, self.target
, &builder
.config
.channel
);
738 if runtimes
.is_empty() {
742 let llvm_config
= builder
.ensure(Llvm { target: builder.config.build }
);
743 if builder
.config
.dry_run
{
747 let stamp
= out_dir
.join("sanitizers-finished-building");
748 let stamp
= HashStamp
::new(stamp
, builder
.in_tree_llvm_info
.sha());
751 if stamp
.hash
.is_none() {
752 builder
.info(&format
!(
753 "Rebuild sanitizers by removing the file `{}`",
760 builder
.info(&format
!("Building sanitizers for {}", self.target
));
762 let _time
= util
::timeit(&builder
);
764 let mut cfg
= cmake
::Config
::new(&compiler_rt_dir
);
765 cfg
.profile("Release");
766 cfg
.define("CMAKE_C_COMPILER_TARGET", self.target
.triple
);
767 cfg
.define("COMPILER_RT_BUILD_BUILTINS", "OFF");
768 cfg
.define("COMPILER_RT_BUILD_CRT", "OFF");
769 cfg
.define("COMPILER_RT_BUILD_LIBFUZZER", "OFF");
770 cfg
.define("COMPILER_RT_BUILD_PROFILE", "OFF");
771 cfg
.define("COMPILER_RT_BUILD_SANITIZERS", "ON");
772 cfg
.define("COMPILER_RT_BUILD_XRAY", "OFF");
773 cfg
.define("COMPILER_RT_DEFAULT_TARGET_ONLY", "ON");
774 cfg
.define("COMPILER_RT_USE_LIBCXX", "OFF");
775 cfg
.define("LLVM_CONFIG_PATH", &llvm_config
);
777 // On Darwin targets the sanitizer runtimes are build as universal binaries.
778 // Unfortunately sccache currently lacks support to build them successfully.
779 // Disable compiler launcher on Darwin targets to avoid potential issues.
780 let use_compiler_launcher
= !self.target
.contains("apple-darwin");
781 configure_cmake(builder
, self.target
, &mut cfg
, use_compiler_launcher
);
783 t
!(fs
::create_dir_all(&out_dir
));
784 cfg
.out_dir(out_dir
);
786 for runtime
in &runtimes
{
787 cfg
.build_target(&runtime
.cmake_target
);
796 #[derive(Clone, Debug)]
797 pub struct SanitizerRuntime
{
798 /// CMake target used to build the runtime.
799 pub cmake_target
: String
,
800 /// Path to the built runtime library.
802 /// Library filename that will be used rustc.
806 /// Returns sanitizers available on a given target.
807 fn supported_sanitizers(
809 target
: TargetSelection
,
811 ) -> Vec
<SanitizerRuntime
> {
812 let darwin_libs
= |os
: &str, components
: &[&str]| -> Vec
<SanitizerRuntime
> {
815 .map(move |c
| SanitizerRuntime
{
816 cmake_target
: format
!("clang_rt.{}_{}_dynamic", c
, os
),
818 .join(&format
!("build/lib/darwin/libclang_rt.{}_{}_dynamic.dylib", c
, os
)),
819 name
: format
!("librustc-{}_rt.{}.dylib", channel
, c
),
824 let common_libs
= |os
: &str, arch
: &str, components
: &[&str]| -> Vec
<SanitizerRuntime
> {
827 .map(move |c
| SanitizerRuntime
{
828 cmake_target
: format
!("clang_rt.{}-{}", c
, arch
),
829 path
: out_dir
.join(&format
!("build/lib/{}/libclang_rt.{}-{}.a", os
, c
, arch
)),
830 name
: format
!("librustc-{}_rt.{}.a", channel
, c
),
835 match &*target
.triple
{
836 "aarch64-apple-darwin" => darwin_libs("osx", &["asan", "lsan", "tsan"]),
837 "aarch64-fuchsia" => common_libs("fuchsia", "aarch64", &["asan"]),
838 "aarch64-unknown-linux-gnu" => {
839 common_libs("linux", "aarch64", &["asan", "lsan", "msan", "tsan", "hwasan"])
841 "x86_64-apple-darwin" => darwin_libs("osx", &["asan", "lsan", "tsan"]),
842 "x86_64-fuchsia" => common_libs("fuchsia", "x86_64", &["asan"]),
843 "x86_64-unknown-freebsd" => common_libs("freebsd", "x86_64", &["asan", "msan", "tsan"]),
844 "x86_64-unknown-netbsd" => {
845 common_libs("netbsd", "x86_64", &["asan", "lsan", "msan", "tsan"])
847 "x86_64-unknown-illumos" => common_libs("illumos", "x86_64", &["asan"]),
848 "x86_64-pc-solaris" => common_libs("solaris", "x86_64", &["asan"]),
849 "x86_64-unknown-linux-gnu" => {
850 common_libs("linux", "x86_64", &["asan", "lsan", "msan", "tsan"])
852 "x86_64-unknown-linux-musl" => {
853 common_libs("linux", "x86_64", &["asan", "lsan", "msan", "tsan"])
861 hash
: Option
<Vec
<u8>>,
865 fn new(path
: PathBuf
, hash
: Option
<&str>) -> Self {
866 HashStamp { path, hash: hash.map(|s| s.as_bytes().to_owned()) }
869 fn is_done(&self) -> bool
{
870 match fs
::read(&self.path
) {
871 Ok(h
) => self.hash
.as_deref().unwrap_or(b
"") == h
.as_slice(),
872 Err(e
) if e
.kind() == io
::ErrorKind
::NotFound
=> false,
874 panic
!("failed to read stamp file `{}`: {}", self.path
.display(), e
);
879 fn remove(&self) -> io
::Result
<()> {
880 match fs
::remove_file(&self.path
) {
883 if e
.kind() == io
::ErrorKind
::NotFound
{
892 fn write(&self) -> io
::Result
<()> {
893 fs
::write(&self.path
, self.hash
.as_deref().unwrap_or(b
""))
897 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
898 pub struct CrtBeginEnd
{
899 pub target
: TargetSelection
,
902 impl Step
for CrtBeginEnd
{
903 type Output
= PathBuf
;
905 fn should_run(run
: ShouldRun
<'_
>) -> ShouldRun
<'_
> {
906 run
.path("src/llvm-project/compiler-rt/lib/crt")
909 fn make_run(run
: RunConfig
<'_
>) {
910 run
.builder
.ensure(CrtBeginEnd { target: run.target }
);
913 /// Build crtbegin.o/crtend.o for musl target.
914 fn run(self, builder
: &Builder
<'_
>) -> Self::Output
{
915 let out_dir
= builder
.native_dir(self.target
).join("crt");
917 if builder
.config
.dry_run
{
921 let crtbegin_src
= builder
.src
.join("src/llvm-project/compiler-rt/lib/crt/crtbegin.c");
922 let crtend_src
= builder
.src
.join("src/llvm-project/compiler-rt/lib/crt/crtend.c");
923 if up_to_date(&crtbegin_src
, &out_dir
.join("crtbegin.o"))
924 && up_to_date(&crtend_src
, &out_dir
.join("crtendS.o"))
929 builder
.info("Building crtbegin.o and crtend.o");
930 t
!(fs
::create_dir_all(&out_dir
));
932 let mut cfg
= cc
::Build
::new();
934 if let Some(ar
) = builder
.ar(self.target
) {
937 cfg
.compiler(builder
.cc(self.target
));
938 cfg
.cargo_metadata(false)
940 .target(&self.target
.triple
)
941 .host(&builder
.config
.build
.triple
)
948 // Those flags are defined in src/llvm-project/compiler-rt/lib/crt/CMakeLists.txt
949 // Currently only consumer of those objects is musl, which use .init_array/.fini_array
950 // instead of .ctors/.dtors
952 .define("CRT_HAS_INITFINI_ARRAY", None
)
953 .define("EH_USE_FRAME_REGISTRY", None
);
957 t
!(fs
::copy(out_dir
.join("crtbegin.o"), out_dir
.join("crtbeginS.o")));
958 t
!(fs
::copy(out_dir
.join("crtend.o"), out_dir
.join("crtendS.o")));
963 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
964 pub struct Libunwind
{
965 pub target
: TargetSelection
,
968 impl Step
for Libunwind
{
969 type Output
= PathBuf
;
971 fn should_run(run
: ShouldRun
<'_
>) -> ShouldRun
<'_
> {
972 run
.path("src/llvm-project/libunwind")
975 fn make_run(run
: RunConfig
<'_
>) {
976 run
.builder
.ensure(Libunwind { target: run.target }
);
979 /// Build linunwind.a
980 fn run(self, builder
: &Builder
<'_
>) -> Self::Output
{
981 if builder
.config
.dry_run
{
982 return PathBuf
::new();
985 let out_dir
= builder
.native_dir(self.target
).join("libunwind");
986 let root
= builder
.src
.join("src/llvm-project/libunwind");
988 if up_to_date(&root
, &out_dir
.join("libunwind.a")) {
992 builder
.info(&format
!("Building libunwind.a for {}", self.target
.triple
));
993 t
!(fs
::create_dir_all(&out_dir
));
995 let mut cc_cfg
= cc
::Build
::new();
996 let mut cpp_cfg
= cc
::Build
::new();
999 cpp_cfg
.cpp_set_stdlib(None
);
1000 cpp_cfg
.flag("-nostdinc++");
1001 cpp_cfg
.flag("-fno-exceptions");
1002 cpp_cfg
.flag("-fno-rtti");
1003 cpp_cfg
.flag_if_supported("-fvisibility-global-new-delete-hidden");
1005 for cfg
in [&mut cc_cfg
, &mut cpp_cfg
].iter_mut() {
1006 if let Some(ar
) = builder
.ar(self.target
) {
1009 cfg
.target(&self.target
.triple
);
1010 cfg
.host(&builder
.config
.build
.triple
);
1011 cfg
.warnings(false);
1013 // get_compiler() need set opt_level first.
1015 cfg
.flag("-fstrict-aliasing");
1016 cfg
.flag("-funwind-tables");
1017 cfg
.flag("-fvisibility=hidden");
1018 cfg
.define("_LIBUNWIND_DISABLE_VISIBILITY_ANNOTATIONS", None
);
1019 cfg
.include(root
.join("include"));
1020 cfg
.cargo_metadata(false);
1021 cfg
.out_dir(&out_dir
);
1023 if self.target
.contains("x86_64-fortanix-unknown-sgx") {
1024 cfg
.static_flag(true);
1025 cfg
.flag("-fno-stack-protector");
1026 cfg
.flag("-ffreestanding");
1027 cfg
.flag("-fexceptions");
1029 // easiest way to undefine since no API available in cc::Build to undefine
1030 cfg
.flag("-U_FORTIFY_SOURCE");
1031 cfg
.define("_FORTIFY_SOURCE", "0");
1032 cfg
.define("RUST_SGX", "1");
1033 cfg
.define("__NO_STRING_INLINES", None
);
1034 cfg
.define("__NO_MATH_INLINES", None
);
1035 cfg
.define("_LIBUNWIND_IS_BAREMETAL", None
);
1036 cfg
.define("__LIBUNWIND_IS_NATIVE_ONLY", None
);
1037 cfg
.define("NDEBUG", None
);
1041 cc_cfg
.compiler(builder
.cc(self.target
));
1042 if let Ok(cxx
) = builder
.cxx(self.target
) {
1043 cpp_cfg
.compiler(cxx
);
1045 cc_cfg
.compiler(builder
.cc(self.target
));
1048 // Don't set this for clang
1049 // By default, Clang builds C code in GNU C17 mode.
1050 // By default, Clang builds C++ code according to the C++98 standard,
1051 // with many C++11 features accepted as extensions.
1052 if cc_cfg
.get_compiler().is_like_gnu() {
1053 cc_cfg
.flag("-std=c99");
1055 if cpp_cfg
.get_compiler().is_like_gnu() {
1056 cpp_cfg
.flag("-std=c++11");
1059 if self.target
.contains("x86_64-fortanix-unknown-sgx") || self.target
.contains("musl") {
1060 // use the same GCC C compiler command to compile C++ code so we do not need to setup the
1061 // C++ compiler env variables on the builders.
1062 // Don't set this for clang++, as clang++ is able to compile this without libc++.
1063 if cpp_cfg
.get_compiler().is_like_gnu() {
1065 cpp_cfg
.compiler(builder
.cc(self.target
));
1069 let mut c_sources
= vec
![
1071 "UnwindLevel1-gcc-ext.c",
1073 "UnwindRegistersRestore.S",
1074 "UnwindRegistersSave.S",
1077 let cpp_sources
= vec
!["Unwind-EHABI.cpp", "Unwind-seh.cpp", "libunwind.cpp"];
1078 let cpp_len
= cpp_sources
.len();
1080 if self.target
.contains("x86_64-fortanix-unknown-sgx") {
1081 c_sources
.push("UnwindRustSgx.c");
1084 for src
in c_sources
{
1085 cc_cfg
.file(root
.join("src").join(src
).canonicalize().unwrap());
1088 for src
in &cpp_sources
{
1089 cpp_cfg
.file(root
.join("src").join(src
).canonicalize().unwrap());
1092 cpp_cfg
.compile("unwind-cpp");
1094 // FIXME: https://github.com/alexcrichton/cc-rs/issues/545#issuecomment-679242845
1096 for entry
in fs
::read_dir(&out_dir
).unwrap() {
1097 let file
= entry
.unwrap().path().canonicalize().unwrap();
1098 if file
.is_file() && file
.extension() == Some(OsStr
::new("o")) {
1099 // file name starts with "Unwind-EHABI", "Unwind-seh" or "libunwind"
1100 let file_name
= file
.file_name().unwrap().to_str().expect("UTF-8 file name");
1101 if cpp_sources
.iter().any(|f
| file_name
.starts_with(&f
[..f
.len() - 4])) {
1102 cc_cfg
.object(&file
);
1107 assert_eq
!(cpp_len
, count
, "Can't get object files from {:?}", &out_dir
);
1109 cc_cfg
.compile("unwind");